<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>Bootstrap列组合</title>
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <link rel="stylesheet" href="css/bootstrap-grid.min.css"/>
    <style>
        body{
            margin-top: 20px;
        }
        .row div{
            outline: 1px solid red;
        }
    </style>
</head>
	<body>
		<div class="row">
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
			<div class="col-md-1">col-md-1</div>
		</div>
		<div class="row">
			<div class="col-md-4">col-md-4</div>
			<div class="col-md-8">col-md-8</div>
		</div>
		<div class="row">
			<div class="col-md-4">col-md-4</div>
			<div class="col-md-4">col-md-4</div>
			<div class="col-md-4">col-md-4</div>
		</div>
	</body>
</html>
